The RPM will not give up any low end tq to a performer, the performer will lose top end power. Also you can get an RPM that will bolt on and the performer requires removeing the heads and redrilling the bolt holes. Even if the performer made more power before 2000 it won't do any good because that motor will stall even a stock converter well past 2000 rpm. I have 2.76 gears in my cuda and with the mild 318 I just sold and the stock converter it would stall at 2200 and it almost never cruised below 2000 even in town.